Combined punch and shear.



I. VNSOS.

COMBINED PUNCH AND'SHEAR.

APPLIOATION FILED JAN. 24, 1910.

i Patented oct'. 8, 1910.

2 SHEETS-SHEET l.

m :ff N m Ml. Q LQ I l avda? rfa/V50 5V l l f' i A J. MNSOS.

COMBINED PUNCH AND SHBAR.

APPLICATION FILED JAN.24, 1910. I

Patented Got. 18, 1910 www" 2 SHEETS-SHEET 2.

JACOB IJIONSOS, OF MINNEAPOLIS, MINNESTA. I

COMEINED PUNCH AND SHEAR.

4 Specification of Lettersatent.

Patented Qct. 155, 1210.

Application filed .i'anuar'y 2.4, 1910.' Serial No. 539,801.

To all whom it may concern:

Ee it known that Japon Mossos, ot Minneapolis, Henne'iin county,Minnesota, have invented certain new and useful lmproveinents inCombined Punches and Shears, csf which the following is a speciiication.

The object ot my invention isto provide a machine by means of which abar-or plate of metal can be easily and quickly punched or cut oii.'

A further and particular object of the invention is to provide a machinehaving great power and one that will be very strong and' durable. A

My invention consists generally in various constructionsandcombinations, all as hereinafter described and particularly pointedout in the claims.

in the accompanying drawings forming part of this specification, Figurel is a side elevation, partially in section, illustrating the punchingmechanism. inl its raised posi tion, Fig. 2 is a vertical sectional viewof the same on a line 'substantially at right' angles Ito the sectionline in F ig. 1, 3 is a side elevation, partially in section,illustrating the punching'mechanism in its depressed position, Fig. 4 isa similar View showing the shearing device and the means -for operatingthe same, Fig. 5 is a detail view yillustrating the plunger actuatingde, vice.

In the drawing, 2 represents the base of the machine having an upwardlyextending bracket or standard 3 overhanging the base. An anvil or die 4is mounted in the base, secured by 4screws 5, and a gage rod A6 is alsomounted in said base secured by a screwy 7 and having an upwardly turnedend 8 by means of which the operator can regulate the distance betweenthe holes punched and the lengthot the bar to be sheared off. Theadjustable bar, 9 overhangs the base and anvil and prevents the plate orbar operated on from fiying upward during the punching or shearingoperation.

10 'is a plunger, vertically siidable in a guide way 1l in the bracket 3and provided with plates 12 adjustable by means of screws 13 to bearagainst the plunger and take up the wear or lostf motionthereof, holdingit against the opposite fixed walls of the guide way.

The link Mis pivotally connectedto the upper end of the plunger and hasa recess 1o therein that is adapted to. receive a crank pinor eccentric.16 that is provided between disks 17 having trunnions 1S which are journaled in the upper portion of the bracket an operating lever 20. Abar 21 connects the disks at their peripheries and this bar, with thecrank and disks, are all preferablyi formed of a single casting, the bar21 being preferably triangular in cross section and provided withconcave faces 22.

In the operation of the machine, the crank 16 exerts a downward pressureon the link le, forcing the plunger 10 downwardly and pressing the punchthrough the material on the anvil or partially therethrough. The

'crank has a great leverage on the link to perform the initial punchingoperation, and when this has been done the surface 22 -oat the barl 21will contactl with the end of the link, as shown clearly in Fig. 8 andcomplete the punching operation, the bar having less leverage on thelink than the crank, but eX- erti'ng suiiicient force to guide thepunchthe remaining distance through the material. Upon the return stroke, theopposite side of the bar 21 will contact with the heel 23 of the link 14and raise the plunger, disengaging the punch from the material, thestripper 24 preventing the mf terial from following the-punch, as usualin machines of this kind.

In Fig. i l have illustrated a shearing lever 25 pivoted at 26 on thebase and carrying al shear knife blade 27, having an edge to cooperatewith the stationary plate 28. The lever has a socket 2 9 to receive arounded lower end 30 on the link 31 and a simi lar operating' mechanismis provided for l will therefore designate it by the same referencenumerals with the addition of the exponent a The crank operates in therecess in the link in the samemanner as described, the'initial shearingmovement being performed by the pressure of the crank stroke iscompleted by the engagement of the bar 21 with the upper end ot'thelink. A take-up plate 32 is arranged within the removable side plate 33on the machine and adjusted by means of-a screw 34, and one of i theplates 12 is similariy mounted ina re- 1 movable plate 35 on theopposite side of the 3. One trunnion has an end19 to receive' the link31 to the one described above and on the link, while 4the remainder ofthe during the initial movement of said link) the initial punchingmovement hut becoming machine. Upon the removal of these side l plates,access may be had to the operating mechanism.

I do not Wish to be confined herein to the precise details ofconstruction shown and described, as in various Ways the mechanismmay'bevmoditied Without departing Jfrom the scope of my invention.

I claim as my invention:-

l. A machine of the class described comprisingl a base, a bracketoverhanging said base, a plunger vertically slidable in said bracket, apunch carried thereby, a link pivotally connected withsaid plunger andhaving a recess, a crank having bearings in said bracket and rotatingtherein and adapted -to enter said recess, said crank exerting adownward pressure on said g link` and plunger to perform the initialpunching operation, and means inoperative but becoming operative duringits subse quent moven'ient to complete the punching operation.

2. An apparatus of the class described comprising a base, a bracketover-hanging said base, a plunger vertically slidable in said bracket, alink pivotally connected with said plunger, means arranged to exert adown 'ard pressure on said link and plunger to perform the initialpunching operation, and means temporarily inoperative during operativeduring its subsequent movement to l completev the punching operation.

3. Adevice of the classdescri'bed, comprising a base, a bracket, avertically sliding plunger, av link pivotally connected with saidplunger, a crank having bearings in said bracket and adapted to enter arecess provided in said link, said crank revolving in its bearings andadapted to exert a downward pressure on said link and plunger, and a bartemporarily inoperative during the initial movement of said link butarranged to engage the same and force said link and plunger downwardafter their initial movement.

Il. In a machine of the class described, an oscillating lever having ashear knife blade, a link-having a ball and socket connection with saidlever and provided ith a recess, a crank having bearings and fittingwithin the recess in said link and exerting a doWnward pressure lon saidlink to perform the initial shearing operation, and means engaging saidlink subsequent to its initial movement to complete the shearing Operation.'

In' a machine of the class described, a

p link haring a recess, disks having trunnions and bmi-mes tlxeretor. acrank between saidv disks adapted to enter said recess, a bar connectingthe peripheries of said disks and normally out. of engagement with saidlink but adapted to Contact therewith during the last part of the strokeof said link, and al metal working tool operatively connected with saidlink.

In witness whereof, I have hereunto set my hand this il" day oi Jann-arylllO.

